Sentence examples for birds are active from inspiring English sources

Owl researchers are a rare breed because most of the birds are active at night and fieldwork is grueling.

The rollerlike birds are active by day (diurnal) and range in length from the size of a small sparrow (about 10 cm, or 4 inches) to about 160 cm (about 63 inches).

During spring and summer, birds are active in bursts through the day and accompany their foraging with song.

Go at the time of the day when birds are active.

After recording the birds' activity in the evenly-lit chamber for a week, scientists found that city birds were active for an average of 40 minutes longer per day than birds that had been captured in a rural area (about 30 miles south of Munich).

Approximately half of the DES birds were active (MA: 4/9, CCM: 4/9) which was also significantly different from controls (p = 0.01).

Experiments were conducted during the hours of the day when the birds were active (Løvlie and Pizzari 2007).

Cowbirds lay their eggs in the nests of other birds and are active mainly in early successional patches.

He tracks the birds who are active participants in a zen-like dance in the sky.

Thus, they omit birds that are active at night (e.g., nightjars and owls), or that are inconspicuous at all times (some raptors).

It's nesting season on the mountain bike course, and the birds and reptiles are active.